[Signed] Churgulia, T. N. History of the Development of Sanitary Education in Abkhazia (Istoriya razvitiya sanitarnogo prosveshcheniya v Abkhazii), 1958. In Russian
[Signed] E. Rogava. Issues in the Historical Phonetics of the Kartvelian Languages, Volume I: Some Issues in the History of Vowels (Kartvelur enata ist'oriuli p'onet'ik'is sak'itkhebi). 1962. In Georgian.
[Signed] Fedotov, M. Historical Connections of the Chuvash Language with the Finno-Ugric Languages of the Volga Region and Perm. Part 1: Chuvash-Mari Connections (Chuvashsko-mariiskie svyazi). First edition. Cheboksary, 1965. In Russian.
[Signed] Ia Kargareteli. Tavparavneli Ch'abuki (The Youth of Tavparavani): A Folk Legend in Verse / recorded in the village of Ertatsminda from the telling of Gabo Eshmakunashvili, 1928. In Georgian.